feat(workflow): add edge-tool routing and realtime runtime

backend/services/pipecat/processors.py

@@ -19,6 +19,7 @@ from pipecat.frames.frames import (
     FunctionCallCancelFrame,
     FunctionCallResultFrame,
     FunctionCallsStartedFrame,
+    InputAudioRawFrame,
     InputTransportMessageFrame,
     InterruptionFrame,
     LLMContextFrame,
@@ -520,11 +521,26 @@ class RealtimeDynamicVariableProcessor(FrameProcessor):
         await self.push_frame(frame, direction)
 
 
+class RealtimeInputAudioGateProcessor(FrameProcessor):
+    """Drop live microphone frames while a deterministic node owns the turn."""
+
+    def __init__(self, is_enabled: Callable[[], bool]):
+        super().__init__()
+        self._is_enabled = is_enabled
+
+    async def process_frame(self, frame, direction: FrameDirection):
+        await super().process_frame(frame, direction)
+        if isinstance(frame, InputAudioRawFrame) and not self._is_enabled():
+            return
+        await self.push_frame(frame, direction)
+
+
 class RealtimeUserInputProcessor(FrameProcessor):
     """Route text-only user-input messages to a realtime service."""
 
-    def __init__(self):
+    def __init__(self, should_ignore_input: Callable[[], bool] | None = None):
         super().__init__()
+        self._should_ignore_input = should_ignore_input or (lambda: False)
         self._register_event_handler("on_user_input")
 
     async def process_frame(self, frame, direction: FrameDirection):
@@ -542,6 +558,12 @@ class RealtimeUserInputProcessor(FrameProcessor):
         if user_input is None:
             await self.push_frame(frame, direction)
             return
+        if self._should_ignore_input():
+            await self._emit_error(
+                user_input.input_id,
+                "当前工作流节点暂不接收用户输入",
+            )
+            return
         if user_input.has_camera_frame:
             await self._emit_error(
                 user_input.input_id,